双酚A在石墨烯-L-谷氨酸修饰电极上的电化学行为研究

摘要

以壳聚糖（CTS）为石墨烯的分散剂，将石墨烯修饰于玻碳电极（GCE）表面，然后通过循环伏安法（CV ）在石墨烯修饰的电极表面电聚合L-谷氨酸，制备了石墨烯-L谷氨酸复合膜修饰电极，并利用该修饰电极研究双酚A（BPA）的电化学行为。结果表明，修饰电极对BPA有较好的电催化作用，在pH＝6．5的磷酸盐缓冲溶液（PBS）中，BPA在修饰电极上有一个明显的氧化峰，峰电流与其浓度在1.0×10-5～8.0×10-5 mol/L与8.0×10-5～8.0×10-4 mol/L范围内呈现良好的线性关系。%The grapheme-L-glutamate electrode was prepared by modified graphene used chitosan (CTS) as dis-persion and polymerizated with L-glutamic acid by cyclic voltammetry (CV ) .The electrochemical behavior of bis-phenol A (BPA) at this electrode was investigated .The results showed that electrocatalytic activity of BPA on a modified glassy carbon electrode was better ,in pH=6 .5 phosphate buffer solution (PBS) ,and BPA had an obvious oxidation peak at the modified electrode .There was an excellent linearity between oxidation current and concentra-tionofBPAintherangeof1.0×10-5to8.0×10-5mol/Land8.0×10-5to8.0×10-4mol/L.